Cutter-bar for mowers, reapers, and corn-binders.



G. D. KNAPP.

CUTTER BAR FOR MDWERS, REAPERS', AND CORN BINDERS. APPLICATION FILED IAN. I2. I9I5.

1,152,322. Patented Aug. 31,1915.

q 4]. qcorfeQ/fya/a/a GEORGE lKNAPP, 0F FREMONT, OHO.

crrrriin-Biinv rou,y Mov/'Ens nnarnns, AND ooiaivuaiivnnns.

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Specification of Letters Patent. v Patentd Aug, 311, 1915, i

Application filed anuary 12, Serial No. 1,790.

To all whom it may concern Be it known that I, GEORGE D. KNArr, a citizen of the United yStates of America, residingat Fremont, inthe county of Sandusky and' State of Ohio, have invented certain new and usefulf Improvements in CutterBarsfor Mowers, Reapers, and Corn- Binders, of which the following is "aspeci;

cation This invention relates to improvements in mowing devices for use in connection with reapers, mowers, and cornbinders,and more particularly to the cutting mechanisms thereof, and has for its object "the provision of a cutter bar equipped with the `'usual knife guards and a plurality of knivesas.- sociated therewithvin the form of two'sets arranged in alternation, one set performing its cutting action in advance of the other,

whereby greater ease of operation is obtained, K An important object is the provision of a device of this character in whichthe knives are pivoted upon the cutter bar and actuated by a reciprocating rod driven bythe usual pitman, and supported by an adjustable wear shoe, the knives being engaged by lugs on the actuating rod contacting with but free fromthe knives whereby the knives may be `individually removed and replaced when broken. y

Further objects and advantages such as simplicity in construction, cheapness in manufacture, efficiency and durability in service, togetherwith the general improve ment of the art will be more fully brought out in the following specification and illus-V trated in the accompanying drawing, in

which:

Figure 1 is a top plan view, broken away, of the cutter bar, constructed in accordance with my invention, showing alternately arranged wide and narrow knives,their arrangement on the iingerebar, and their connection `with the knife operating-y bar, and also showing the narrow knives inposition to commence cutting, while the broader blade has performed its'l cutting function;

Fig. 2 is a similar view showing the posi-` tion of the knives after the cutting operation hasbeen effected; Fig. 3 is avlongitudi nal sectionaly view, taken on ytheline 3-2-3 Fig, 1, and,Fig. i is a cross sectionalview,

on line 4 4, Fig. 1, showing the means for mounting the vknives on the fingerbar, and means for adjusting the knife operating bar.

Referring more particularly to the drawv ing, the numerall designates the cutter bar to which are secured, in they usual manner, the knife `guards 2 provided with the usual slots 3. The cutter bar 1is provided with a longitudinal groove i within which is disposeda wear-shoer, which is engaged by .adjusting screws 6 extending through the bottom of the cutter bar, for a purpose to be described, and which is secured against longitudinal movement by a screw 7 passing `through the shoe and into the cutter bar.

This shoe 5 is also provided with holes or recesses for the reception of a suitable lubricant. v

` rlhe cutting mechanism comprises two sets of knives 8 and 9, the knives 8 being wider than the knives 9 and both sets of knives beingarranged in alternation. rlhe knives are pivoted upon the vcutter bar 1, as shown in detail in IFig. 4l, this pivotal connection being as follows: The bearing for each'knife consists of a member 10 threaded through, or otherwise secured in, the cutter bar, and

"having a curved overhanging head provided with holes whereby it may be turnedby a Spanner. 'Eachblade is pressed to form a curved depression 11 disposed over the head of the' member 10, the depressed portion 11 being formed with a central opening `12 through which passes a screw 18 having a curved head 14: engaging the upper side of the depressed portion t1. The screw 13 is threaded Athrough the member 10 and is provided below the cutter bar with a` nut 15, or'other suitablelocking means. The curvature of the head of the member 10, the depressed portion 11, and the head 14, vis

'such that spaces 1G and 17 are formed between these members. These spaces are adapted to be y'filled with vGrease. lt' will be observed that the knives may be vibrated and forth for performing a cutting action comprises a longitudinally reciprocatory rod'lS disposed within the groove 4: upon the weer shoe Sand previded at one end with set wider than the other,` isv animportantvfeature of my invention. The difference in n any suitable socket member 19'for the eni gagement of a pitman 2O which may be driven by any suitable means, or Vby a crank movement such as indicatedin vthe drawing by the number 21. The top Vface of the rod 18 is flush with the top of the cutter bar 1 and has a plurality of spaced lugs V22 eX- tending ,upwardly therefrom. The rear por" tions of the knives are formed as extensions 23, the side edges of which are preferable, v

bent upwardly, as shown at 24.: -When the device is assembled the extensions 23 of the knives are disposed upon the top of the rod 18 with the 'edges 2-1 engaging the lugs 22,

lasv clearly shown in Fig. 1. Astherod 18 is reciprocated by the driving `means 21, the

lugs 22 engaging the edges 24k will cause the knives to vibrate back and forth upon their pivots, asis evident. j

The provision of two setsv` of knives, one

v widthis such that when the wider knives 8 tion, .the .narrow knives 9 will have their not cutting.

the set of wider knives 8 will cut in advance v 'of the narrow knives, this cutting, occurring have passed into the slots 3 in the guards 2 and have'thus performed their ycutting acedges closeto the edges of the guards 2 but not contacting therewith, 'and consequently This arrangement insures that j edges/will Vmove into the slots andyperformA Y ytheir'cutting action. V`By this arrangement of knives and operating parts, it will be apparent that as the deviceis operated,all

j the knives will be moved simultaneously while the sets of knives will cut in alternation, thus making it easier rto-operate the device as less driving power will be required.: In case a knife breaks or becomes dull it vmay be readily'removed without disturbing any of the other knives.

In vorder to accomplish this it is onlynecessary to remove the screw y13 by Ameans of a Spanner, the old knife removed and a new one substituted, las

v is evident.'V

In casel of wear, the wear shoe 5 may be i moved upwardly to take up any.Y looseness y by means 'of the adjusting screws 6 as is apparent.

TheV operating rod 18 may be readily removed without disturbing any of the knives,

by removing the screw 7 and then pulling the wear shoe 5 .entirely out of the groove 4L. This removal ofthe shoe 5 will allow the rod 18 to drop down' into the -groove 4: whereupon the lugs 22 will lie in a plane lower than the extension 23 ofthe knives, and said rod 18 may be easily removed from said groove, as is evident.

From-the foregoing description, taken in connection with the drawing, it will be apparent that I have provided a simple, novel, and eiicient mowing device which is not apt .to clog, which will be operated with a minimum expenditure of power, and in which Y'the individual knives may be easily and quickly removed and replaced without disturbing the other knives.

' Having thus described my invention, I claim: n

1. Ina mowing device, a cutter bar having knife guards thereon, a plurality of knives pivoted thereon and means for vibrating said knives back and forth, some predetermined knives being' vof greater width than others, said wider knives being radapted to co-act with the adjacent knife guards before said narrower knives co-act with the knife guards adjacent thereto,

whereby said wider knives will cut sooner than the other knives i when all of said knives arev moved simultaneously.

2. In a mowingv device, a cutter bar provided with knife guards, two sets of knives pivoted thereon, and means for vibrating said knives back and forth, one set of knives being wider than the other-set and arranged in alternation'therewith, said wider knives being adapted to co-act with the adjacent knife guards before said narrower knives coact with the knife guards adjacent thereto, whereby the wider set will complete its cutting action before the narrower set commences.

3.In a mowingdevice, a cutter bar hav- .ing` knife guards thereon, a plurality of knives pivoted intermediate their ends between said guards, a groove in said bar, and areciprocating driving rod therein, lugs 011 said driving baradapted to contact with the ends of said knives to vibrate the same, and a removable shoe in said groove beneath said driving rod, whereby, by the removal of said shoe, said driving bar may be disengaged from said knives.

t. In a mowing device, a cutter bar having guards thereon, bearing plugs, adapted to set and be secured in suitable openings in said bar intermediate said guards, provided with rounded heads, knives, each havinga seat therein, adapted to set over and-upon said rounded -heads, bolts, having cup heads, adaptedy to pass through said knives and plugs to hold said knives in pivoted position on said bar, and means for securing said bolts in positionV to hold said knives against displacement. 5. In a mowing device, a cutter bar having guards thereon, and screw threaded plug adaptedto set into a suitable screw threaded openingin said bar intermediate said guards, and provided with a rounded head7 In testimony whereof I have atixed my a knife having a seat therein adapted to set signature in presence of two Witnesses. over and upon said rounded head, and a bolt having a euphead adapted to pass through GEORGE D'. RNAPP said knife and plug to hold said knife in Witnesses:

pivotal position on said bai, and means for R. A. HUNsINGER,

securing` said bolt in position. JOHN J. LEHMANN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washingtonl D. G'. 

